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Segment Information (Schedule Of Income (Loss) From Operations By Geographic Area) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Income (loss) from operations $ (3,717) $ (23,842) $ (20,476) $ (41,366)
Reportable Geographical Components [Member]        
Income (loss) from operations (2,930) (23,330) (19,041) (40,347)
Intercompany Sales [Member]        
Income (loss) from operations (787) (512) (1,435) (1,019)
Americas [Member] | Operating Segments [Member]        
Income (loss) from operations (4,747) (29,186) (18,933) (52,292)
Germany [Member] | Operating Segments [Member]        
Income (loss) from operations 3,960 (548) 4,971 1,292
Other EMEA [Member] | Operating Segments [Member]        
Income (loss) from operations (8,064) (938) (16,182) (2,273)
Asia Pacific [Member] | Operating Segments [Member]        
Income (loss) from operations $ 5,921 $ 7,342 $ 11,103 $ 12,926